RU2372177C2 - Machine for pressure contact butt-seam welding of rails by flashing - Google Patents

Abstract

FIELD: railway transport.

SUBSTANCE: invention relates to the equipment for pressure contact butt-seam welding by flashing, in particular for the fixed machines for welding of rails into long lengths. Machine for pressure contact butt-seam welding of rails by flashing consists of mobile and immobile pillars connected with each other by shafts, upset cylinders, welding equipment, outboard roller centralisers and flash-taker joint. The joint consists of mobile flash-taker plates with actuator's hydrocylinders, immobile arm support brackets with bearing plates. Outboard rollers of the centraliser are made to enable centering along the base of rail. Hydrocylinders of the flash-taker plates' actuator is made to leave the pass for isolated joint during its opening (i.e. sufficient pass is available). Bearing plates have the form to enable the pass of the isolated joint. Arm support bracket of the flash-taker is equipped with removable guidepaths for advance centering of the rail along the base.

EFFECT: invention enables the quality welding of rails up to 800 m length.

2 cl, 5 dwg

Description

The invention relates to equipment for flash butt welding by fusion, and specifically to the design of stationary machines for welding rails in long lashes.

Currently, welding of rail lashes for a welded jointless path is carried out at stationary rail welding enterprises (trains) (RSP) with contact butt machines of the K-1000 and MCP 63.01 types and along the way with suspended contact butt welding heads of the K-355, K-900, K-922 type and MCP-80.01, which are part of the PRSM (mobile rail welding machines).

In the Russian Federation, the standard length of the manufactured rails is 25 m. At the same time, some of the rails (10-20%) are supplied by plants of non-standard length (12-24 m). The maximum length of rail lashes welded in the RSP and transported on special trains is 800 meters. Block section: part of the inter-station span during auto-lock or automatic locomotive signaling, limited by traffic lights and insulating joints. The length of the block sections is from 1000 to 2100 meters, depending on operating conditions. As a rule, one or two rail lashes of standard length (800 meters) and one or two non-standard lengths are laid within the block area. Between rail lashes leveling spans are arranged, consisting of three rails 12.5 meters long, and in the presence of an insulating junction of four rails 12.5 meters long. Rail lashes with a length of a whole leg are considered optimal and economically advantageous, without leveling spans - from the output to the input arrow, while the insulating joints should be welded into the rail lash.

The most common stationary rail welding machine K-1000 for flash butt welding of rails by reflow, adopted as a prototype, (“Equipment for resistance welding of rails and its operation” S.I. Kuchuk-Yatsenko, publishing house “Naukova-Dumka”, Kiev, p. 105-119; “Flash butt welding” S.I. Kuchuk-Yatsenko, Naukova-Dumka publishing house, Kiev, 1992, pp. 215-219; prospectuses of KZESO OJSC “Stationary machines for rail welding” ) includes fixed and movable columns interconnected by shafts, draft cylinders, welding equipment, n external roller centralizers, a scraper assembly containing movable scraper plates with drive hydraulic cylinders, fixed scraper brackets with support plates having a shape that allows passing a rail without an isolated joint. All these essential features, except for the shape of the base plates of the scraper, which allows passing the rail without an isolated joint, are in the proposed technical solution.

This machine is designed for welding rails in long lashes, as well as standard lengths of 25 m. In this case, welding of short rails with made insulating joints in rail lashes is carried out, as a rule, at the place of laying (spans) by hanging contact welding machines. To perform welding on rail lashes of insulating joints, interruptions in the movement of trains (windows) are required, which leads to large financial and time costs. At the same time, these works can only be performed during positive temperatures and in dry weather. Welding rails with insulated joints in the lash on the FSP is impossible for structural reasons - the working bodies of stationary machines are not able to pass insulated joints through the mechanisms of the machine.

The present invention solves the technical problem of bringing rail lashes, which are welded under the conditions of RCB, by stationary rail welding machines of various types, to a length of 800 meters, adopted on the railways of the Russian Federation and the CIS countries, according to the conditions for the transportation of rail lashes on special trains from the RCB, to laying places on the way . This will significantly reduce the amount of work on welding joints by hanging machines (PRSM) directly on the hauls, reduce the required number of “windows” for performing these works, increase the load of special compounds for the transportation of rail lashes, improve the quality and reliability of welded joints, since only in conditions RSP are carrying out work on heat treatment (normalization) of welded joints, it is impossible to carry out the specified work on stages. The above allows you to significantly reduce the cost of maintaining and repairing the track, to accelerate the pace of work to bring the length of rail lashes to optimal parameters.

To achieve the technical result in a flash butt welding machine, including fixed and movable columns interconnected by shafts, draft cylinders, welding equipment, external roller centralizers, a scraper assembly containing movable scraper plates with drive hydraulic cylinders, fixed scraper brackets with supporting plates, the outer rollers of the centralizer are made on the basis of centering along the sole of the rail, hydraulic cylinders of the drive plate They can be used to skip an insulated joint during opening (i.e., they have sufficient travel for this), the base plates are shaped to allow an insulated joint to pass, and the arm of the scraper is equipped with removable guides for pre-centering the rail along the sole. At the same time, to reduce the loads on the cantilever mounted scraper knives, the base plates on the side of the rail have a shape that repeats the shape of the side surface of the rail section in the region of the isolated joint, taking into account the bolts.

Distinctive features of the proposed welding machine from the well-known are the following: the outer rollers of the centralizer are made on the basis of centering along the sole of the rail, the hydraulic cylinders of the drive of the scraper plates are made with the possibility of skipping the insulated joint during opening, the base plates have a shape that allows skipping the insulated joint, and the bracket of the scraper is equipped with removable guides for preliminary alignment of the rail on the sole, as well as additional base plates on the side of the rail are shaped, repeating the narrow shape of the side surface of the rail section in the region of the isolated joint, taking into account the bolts.

Due to the presence of these distinctive features in combination with the known ones indicated in the restrictive part of the formula, the following technical result is achieved - the proposed machine allows to manufacture whites with insulated joints under stationary conditions, which significantly improves the quality and reliability of the rail track, and also reduces the cost of its installation, repair and maintenance.

The proposed invention can find application in the construction of stationary machines for flash butt welding.

The invention is illustrated by drawings, figures 1-5.

Figure 1 schematically shows a stationary machine for welding railway rails into long lashes, including isolated joints.

Figure 2 shows a view of BB (see figure 1) on the filler of the welding machine in the open state.

In Fig.3 shows a longitudinal section aa (see Fig.1 and 2) along the axis of the mechanisms of the stripper.

Figure 4 shows a section GG (see figure 3) along the base plates of the bracket for the pickup.

Figure 5 shows a section bB (see figure 1) at an isolated junction in the region of the rollers of the external centralizers.

Shown in figures 1-5, the machine for flash butt welding by fusion includes a fixed 1 and a movable 2 columns, interconnected by shafts 3, upsetting cylinders 4, welding equipment (not shown), external roller centralizers 5, a puller assembly containing movable plates 6 of the pickup with hydraulic cylinders 7 of the drive, fixed brackets 8 of the pickup with base plates 9, while the hydraulic cylinders 7 of the drive of the plates 6 of the pickup are capable of skipping the insulated joint 10 when opened, the base plates are 9 gratings the pickups are also made with the possibility of skipping the insulated joint and have a shape that repeats the shape of the side surface of the section of the rail 11 in the region of the insulated joint 10 taking into account the bolts 12 (located asymmetrically), and the arms 8 of the pickup are equipped with removable guides 13 for preliminary alignment of the rail 11 along the sole.

The rollers of the external centralizers 5 shown in FIG. 5 are made on the basis of centering along the sole of the rail 11, i.e. located not as in the prototype in the region of the neck of the rail 11, but in the region of its sole.

The proposed machine for flash butt welding works similarly to the prototype. The only difference is the following - due to the wider opening of the plates 6 of the stripper and the position of the base plates 9, which allows the insulated joint 10 to pass along with the bolts 12, the rail lash with insulated joints 10 freely passes through the welding machine. At the same time, at the entrance to the car, the rails 11 are centered by the rollers 5 along the sole, and at the entrance to the stripper zone, the rails 11 are pre-centered (before precise alignment before welding) by the removable guides 13 (otherwise, an insulated joint 10 can touch the structural elements).

Claims (2)

1. A machine for flash butt welding of rails by reflow, comprising fixed and movable columns interconnected by shafts, draft cylinders, welding equipment, external roller centralizers and a scraper assembly, consisting of movable scraper plates with drive hydraulic cylinders and fixed scraper brackets with support plates, characterized in that the outer rollers of the centralizer are made with the possibility of centering along the sole of the rail, the hydraulic cylinders of the drive of the stripper plates are made with the possibility of ropuska insulated splice the disclosure, the supporting plate are shaped to pass an insulated joint, a reamer arm is provided with removable guides for pre-centering of the rail on the sole. 2. The machine according to claim 1, characterized in that the base plates on the side of the rail have a shape that repeats the shape of the side surface of the rail section in the region of the insulated joint, taking into account the bolts.

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